Definition of unicycle noun from the Oxford Advanced Learner's Dictionary

 

unicycle

 noun
noun
BrE BrE//ˈjuːnɪsaɪkl//
 
; NAmE NAmE//ˈjuːnɪsaɪkl//
 
(also monocycle) Types of vehicle
 
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a vehicle that is similar to a bicycle but that has only one wheel See related entries: Types of vehicle
See the Oxford Advanced American Dictionary entry: unicycle